Swaging apparatus



Patented July 29, 1930 "STATES MB PAUL A. NELSON, or DENVER, cofonnno, is siema. iar drnsnnhss qnmnnirs, To

THE GARDNER-DENVER COMPANY, OF

DELAWARE Quincy, I LInoIs, A; COREOBATION or SWAGING Arm-mines Application filed September 14, 1926. Serial No. 135,436.

The present invention relates to swaging die apparatus, and While particularly intended for use as part of drill-forming and sharpening mechanism, may be employed independently thereof.

In the accompanying drawings Fig. 1 is a vertical sectional view through one embodiment of the invention,

Fig. 2 is a view'in elevation at right angles to Fig. 1 and showing the valve casing in section, i

Fig. 3 is a horizontal sectional View on the line 33 of Fig. 2, Fig. 4 is a vertical cross-sectional view on the line 44 of Fig. 2, and

Fig. 5 is a detail sectional view substantially on the line 55 of Fig. 1. V

In the embodiment disclosed, a base 6 is employed, on which is located a standard 7 This standard is provided in the upper portion of one side witha seat 8, in which is fitted one side of a vertical cylinder 9 that overhangs a bed 10 formed upon the base at one side of the standard 7. In the cylinder 9 is located a vertically reciprocating piston 11, having a reduced downward extension 11 that projects below the lower end of the cylinder. The piston head is thus provided with an upper end surface or pressure area 12 and a lower shoulder, forming an oppositely disposed pressure area or surface 13, the latter being of less eXt-entthan the upper surface 12.

The lower end of the extension 11 is provided with a socket 14 that receives the shank 15 of a swaging die 16. A coacting sw aging die 17 is located on the bed 10, the upper die l6 obviously moving downwardly into coaction with the lower die 17 and upwardly out of coaction therewith, being carried by the piston. The lower die 17 has in its under face a groove 18, and the bed 10 has in its upper face a groove 19 alined with the groove 18. This forms an opening throughwhich a clamping bolt 20 passes, the said clamping bolt having a head 21 that secures in placea clamping plate 22.

Motive fluid for effecting the actuation of the piston is supplied from any suitable source, through a passageway 23 that extends vertically in the standard 7 and communicates with a -branclr24s formed in the adjacent side of thecylinder The branch 24L opens into the lower portion of t'he cylin' der below the lower pressure surface-13. Se-

cur'edto the side ofthe standard 7 opposite m to that-on wnieh the cylinder 9. is mounted, is a valve-casing25 and leading fromthe supply passageway 23 is a supply branch 26 that opens into a supplyj groove 27 formed around the chamber- 28 in the valve casing.

Another groove 29, located alongside the groove 27, is in communication by means of a passageway 30 wit-lithe upper end of the cylinder above the piston'il y A third annular groove 31, located next to the groove 29; is in communication with an exhaust passageway opening to atmosphere. Inthe valve chamber 28 is a. reciprocatoryplunger valve 33 having end heads 34 and 35 and a central head36w The head's34 and 35 close the ends of the valve chainber, while the head 36 is movablefto positions to cut off com:

munication between the adjacent grooves-27 and 29 and 29 and 31; This plunger valve is connectedby'a-link 3.7 with anoperati-ng hand crank 38. mounted as shown at .39 on the standard. i It will be understood that when motive fluid, as air, is supplied to the passageway 23, it will have constant access to the lower portion of the cylinder and operate constantly against the lower pressure surface 13 to raise the piston. Motive fluid will also have access to the groove 27, but if the valve is in the position shown in Figures 2 and 3, the motive fluid will be cut off from the passageway 30. If the-valve is moved to the right however,.communication will be established between the grooves 27 and 29, and consequently motive fluidflowing through the passageway 30, will enter the upper end of the cylinder, and operating on the surface 12 of greater area, will overcome the resistance of the fluid against the surface 13 and move the piston downwardly with speed and force, thus oausing the die 16 to deliver a swaging blow to the die l7.v When the valve is moved to the left, this communication will be again out off and then grooves 29 and 31 will be brought into communication so that the motive fluid above the piston can exhaust through the passageway 30, grooves 29 and 31, and exhaust port 32.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art Without further-description, and it will be understood.

that various changes-in the size, shape, proportion and minor details of construction may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the invention.

lVhat I claim, is

1. In swaging apparatuathe combination with a base having a standard, of a vertical cylinder mounted one onejside of the standard, a valve casing mounted transversely of and onthe other side of the standard below its upper end, a piston in the cylinder having an upper and a lower pressure, surface, the former being greater than the latter, a passageway in the standard from the valve casing to the upperportion of the cylinder, a supply passageway in the standard having branches leading to the valve casing and to the lower portion of the cylinder, 'a valvein the valve casing controlling communication between the branch thereto and the passageway therefrom, and coacting swaging dies, oneof whichis carried by the lower end of the piston and is located below the ,lowerendof the cylinder. ,7 a :v r

2. In swaging apparatus, the combination with a basehavi'ng. a' bed and a cylinder and piston overhanging the bed, of a swaging die carried by the piston, a'coacting swaging die located on the bed, said bed and latter swaging die having alined grooves in and across their associated faces, a bolt having its shank located in the alined grooves, and a holding clamp for the die engaged therewith and mounted onthe bolt between the same and the bolt head. 7 3 i In testimony vwhereof, I aflix my signature.

PAUL-A. NELSON. 

